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首页> 外文会议>AMD-vol.257; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20061105-10; Chicago,IL(US) >COMPUTATIONALLY EFFICIENT APPROACHES TO SIMULATE THE DYNAMICS OF MICROBEAMS UNDER MECHANICAL SHOCK
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COMPUTATIONALLY EFFICIENT APPROACHES TO SIMULATE THE DYNAMICS OF MICROBEAMS UNDER MECHANICAL SHOCK

机译：机械冲击下微梁动力学的计算有效方法

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摘要

We present computationally efficient models and approaches and utilize them to investigate the dynamics of microbeams under mechanical shock. We explore using a hybrid approach utilizing a beam model combined with the shock spectrum of a spring-mass-damper model. We conclude that this approach is computationally efficient and yields accurate results in both quasi-static and dynamic loading conditions. We utilize a reduced-order model based on the nonlinear Euler-Bernoulli beam model. We demonstrate that this model is capable of capturing accurately the dynamic behavior of microbeams under shock pulses of various amplitudes (low-g and high-g), in various damping conditions, structural boundaries (clamped-clamped and clamped-free), and can capture both linear and nonlinear behavior. We investigate high-g loading cases. We report significant increase in the computational cost of simulations when using traditional nonlinear finite-element models because of the activation of higher-order modes. We demonstrate that the developed reduced-order model can be very efficient in such cases.
机译：我们提出了计算有效的模型和方法，并利用它们来研究机械冲击下微束的动力学。我们探索使用混合方法，利用梁模型结合弹簧质量阻尼器模型的冲击谱。我们得出的结论是，这种方法在计算上是有效的，并且在准静态和动态加载条件下都能产生准确的结果。我们利用基于非线性Euler-Bernoulli光束模型的降阶模型。我们证明了该模型能够准确捕获在各种阻尼条件，结构边界（无钳位和无钳位），各种振幅（低g和高g）的冲击脉冲下微梁的动态行为。捕获线性和非线性行为。我们调查了高克装载情况。我们报告由于使用高阶模态，使用传统的非线性有限元模型时，仿真的计算成本显着增加。我们证明，在这种情况下，开发的降阶模型可能非常有效。

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